Record display device



Oct. 15, 1935. E. T. MOTTRAM 2,017,633

RECORD DISPLAY DEVICE Filed Deo. 26, 1934 By Ww ATTORNEY Patented Oct.15, 1935 PATENT oT-FicE RECORD DISPLAY DEVICE Elliott T. Mottram,Brooklyn, N. Y., assignor to Bell Telephone Laboratorios, Incorporated,New York, N. Y.,'a corporation of New York Application December 26,1934, Serial No. 759,165 l3 claims. (o1. ca -24) This invention relatesto improvements in record display devices and particularlyto devices -ofthis type serving as news projectors and employing a telegraph recorderin which the sup- 5 ply of recording paper or the like must bereplenished at intervals by unskilled persons and with minimuminterruption to the operation of the device.

In telegraphic news projectors of this type it l is desirable to use atelegraph recorder of standard designin combination with the equipmentfor optical display 'of a portion of the recorded news message. A

It is an object of the invention to provide an l equipment in which therecorder or printer may be made readily accessible for change ofrecording paper and. color ribbon without disturbance to other parts ofthe equipment.

It is a further object of the invention to provide a projectorequipmentQin' which the record-` ing device for the purpose of servicingmay be at least partly withdrawn from the cabinet and the other parts ofthe equipment without interference therewith. It is a further object toarrange the xed parts oi the optical system in such a display device inrelation to the removable printer and its record so that a steady imageof the record may be secured.

$0 In accordance with a feature of the invention, the recording printeris placed within a cabinet or box which has a door in i ts front side,and the printer ismounted on 'telescoping tracks so that it may beeasily pulled from its normal 35 operating position .and at least partway out through the door opening for servicing. Parts oi' the opticalsystem, such as the projecting objective and the illumining lamps and aventilating system including long sound-proof passages o and aircirculatingmeans are also'located within this cabinet. 'Ihese parts ofthe equipment are arranged to the rear and two sides of the printer insuch a manner as not to interfere with the withdrawal of the printerfrom its normal operative relation with uns eqmpment.

In accordance with another feature of the invention special guidingmeans for rthe recording paper is mounted on a framework for cooperationwith the ordinary platen or paper feeding means on the printer forexposure of an area containing several lines of the record to theoptical system. This frame ismounted. together with the recording deviceor printer on the telescoping .tracks to move as a unit with the record-55 ing device. The parts of the optical system which are` located withinthe cabinet are mounted on a stationary frame; coordinating extensionsare provided on the two frame structures which are normally fastenedtogether in order to insure that the exposed area of the 5 record andthe optical elements under normal operating 'conditions form amechanical unit which, when subjected to vibrations caused by theprinting operations,will vibrate in unison ,and thus produce a steadyimage. These exten- 10 sions are easily disoonnected'by means 'of ngerscrews when the typewriter is to be withdrawn.

These and other features, capabilities and advantages of the invention`will appear from the following description'of one specific embodiment15 of my invention, which are illustratedin the accompanying drawing inwhich- Fig. 1 is a vertical sectional view of one embodiment of theinvention. 'A Y Fig. 2 is a view taken on line 2-2 of Fig. 1 20 showingthe arrangement *of the equipment in the lowerV apparatus compartment;the lid of the compartment being open.

Fig. 3 is a partial side view of the lower cablnet, as it is shown inFig. 2. 25

The invention relates to a projecting device such as disclosed in anapplication for patent Serial No. 759,163 filed by Harry Pfannenstiehlon even date with the filing of the present apv plication.

For a full understanding of the operationvof a complete station to whichthe features of the present invention may be applied, reference shouldbe had to the disclosure in U. S. Patent No. 1,904,164 to S. Morton etal. issued on April 18, 1933, of a,v telegraph printer of the pageprinter type suitable for the purposes of this invention. Only suchparts of the device shown in that patent are referred to in thefollowing d efscription and shown on the attached drawing as arenecessary to facilitate an understanding of the features and operationof the present invention. f

Referring to the drawing the projector comprises a general structurehaving a; lower compartment I2 and an upper compartment 22; the

latter is supported directly above the lower cornwhich is open at thebottom, contains a large mirror 23 andthe screen 24 of translucentmate-` 65 strip 48 before an audience. Y

The telegraph printer I0 is set on a slidable frame 10 which is placedon a stationary base 15,

' and it is held rigid with respect to the optical system, i. e.,projecting lens, lamps and reecting `mirror, by means of the thumbscrews 18 which particularly suited for the present purpose in that ithas a printing roller or platen 40 which is stationary except for thecase shift and line shift motions, bothof which can beobserved in theimage on the screen 24, and in having visible printing which permits theoptical system to observe the actual printing of the message as readilyas can a typist operating an ordinary typewriter.

The printer carries a supply roll 49 of standard opaque paper strip 48of suilicient width for page printing, and the paper is led over thepaper straightening rod 43 and about the platen 40 in the usual manner.The paper is then passed behind the color ribbon. 42 at the line ofprinting.

Special guiding means for the paper strip have been attached to theplaten structure of the standard telegraph printer I0 in order that thepaper may form an area for simultaneous projection and display ofseveral recorded lines, including the line being printed.

The guide means consist of a guide roller 80 pivoted in parallel levers84 (only one appears in the drawing) to two steel uprights 12 which formpart of the removable frame 10. The guide roller 80 is substantiallysimilar to platen 40 and is mounted in a pair of brackets 82 forparallel movement therewith` during shifting. The guide roller 80 isdriven from the platen shaft by suitable means, such as a chain andsprocket arrangement 90, to partake with the platen in the line feedmovement. For further details of the guiding means for the recordingstrip reference may be had to my application for patent Serial No.759,164 filed on even date with the filing of the present application. D

The recording strip is fed from the platen 40 over the guide roller 80and out through a slot I6 in the lid I 5 of compartment I2. In thismanner the recording strip is passed through a lplane area of exposureformed between the platen 40 and guidev roller 80, and the paper is linefed simultaneously by both rollers and the' exposed area is raised andlowered bodily with the two rollers during case shifting operations.

The optical system comprises a. viewing mirror ,|00 or other reflector,such as a prism, placed ,opposite the exposed area of the record strip48 at which extends through 4the lid I5. The image is received by themirror 23 in the upper compartment 22 which is placed at a 45 angle withthe axis of the lens |05, `so that the image will be inverted again andthrown, greatly enlarged, on the translucent screen 24.

The light source for this optical system comprises two incandescentlampsl |02, placed nearly in line with the Viewing mirro'r |00 in frontof the exposed record area, so that the image will be obtained. by lightreflected by the record strip. The light from the lamps IIJI, isintensified by curved reflectors |04 placed behind the lamps, which aredesigned in well-known manner to blur aol'gosa lrial for displaying theimage of the record on the image of the lamp laments on the paper stripso that the record will appear evenly illuminated on the screen 24.

The general arrangement is such that the printer proper may becompletely removed from 5 .finger-screws 18, 18, which attach theuprights 15 12 from the movable frame 10 by means of bars 11 to thebracket 16, which forms part of the stationary structure 15.

The stationary frame 15 is built up in the rear of the cabinet I2 andcarries suitable brackets for 20 the mounting of the mirror I 00, thelamps |02 .with their reectors |04 and for a blower unit^ |20,

for cooling the paper in front of the lamps.4 These partsare groupedbehind and to the sides of the printer, sothat they in no way interfere25 with the withdrawal of the printer on the telescoping racks 1I.

The objective lens system |05 is mounted in a bracket 16 also fastenedto the stationary steel frame 15 so that it too remains in position when30 the printer is removed. However, it has been found advantageous toprovide a pair of connectingbars, 11 extending from the lens bracket 18and bolted for easy detachment by the nger screws 18, 18 to the uprights12 which are integral 35' with the movable steel frame 10, in order thatthe printer with its exposed record area and the optical systemincluding the objective |05 may vibrate as a unit, du to the printeroperations, and in order that the vibrations may be damped to 40becomepractically unnoticeable in the image on the screen 24.

The blower unit |20 is supplied with air through a long Ventilatingpassage |24 and forces the air out again from the compartment throughasimi- 5 lar passage |25. These passages form tortuous passages for thenoises developed inside the cabinet and connect to openings |22 and |23in the rear wall of the cabinet. These passages are placed along theside walls of the cabinet I2 and '56 thus leave space clear for theremoval of the printer.

What is claimed is:

1. A message display projector including an automatic telegraph recorderhaving a recording 35 strip of combustible material exposed forillumination and projection. an optical system comprising a source ofillumination and an objective for projection of an image of the exposedstrip,. a Ventilating system forkeeping said exa) posed strip cool, andcomprising two long soundproof Ventilating passages with openings towardsaid exposed strip, and a blower for forcing air acrossv the spacebetween said passages to pass over said exposed strip and a sound-proofcabinet g3 enclosing said recorder and said optical and venvtilatingsystem and having openings for said ventilating system, characterized inthis that said cabinet `has a door in the side lback of said recorder,that the elements constituting the optical 7i) system and theVentilating system are mounted in front of and to the sides of saidrecorder, and that said recorderis mounted on tracks for easy withdrawalfrom its operating position to pass at least part way out through saiddoor without ing5 terference with the elements of the optical andVentilating systems in their normal positions.

2. A record display device comprising a compartment having a front sidearranged to be opened, a recording device centrally placed within saidcompartment on telescoping tracks for easy removal from its operatingposition at least part way through said door, said recording devicehaving a record strip formed into an exposed area. facing towards therear of said compartment; optical means placed in xed positions in therear of said compartment with respect to said recorder and opposite saidarea and including illumining means for said area, an observingreflector and a projecting lens system; a Ventilating system comprisinga blower mounted in xed position at one side of said compartment withrespect to said recorder for forcing air across said exposed area. andfurther comprising two Ventilating passages to the outside of saidcompartment mounted on opposite sides of said recorder for renewal of ona stationary frame and said recording device is mounted on a framemovable on said telescoping tracks and having uprights for supportingsaid exposed area of the record strip, and in which said stationary andsaid movable frames are detacliably fastened together at the base ofsaid recorder to insure proper focus and at the said exposed area toinsure that said area and

